These data were averaged over the entire distillation curve to identify the range of variations that might occur.

To adapt the method for unstable fluids such as biodiesels, the authors made repeated distillation curves of samples and quantified the variation in parameters such as temperature for each distillate fraction across the different runs of the experiment.

6, well within the standard range of 32-40; flashpoint of 154 degrees Fahrenheit; at the lower (more positive) end of the acceptable range of 130- 200 degrees Fahrenheit; an initial boiling point of 336 degrees Fahrenheit, at the lower (positive) end of the acceptable range of 332-436 degrees Fahrenheit; and the distillation curve conformed to the ASTM D86 standard of 332-638 degrees Fahrenheit.

The results show that 16 percent high octane butanol blends have the added advantages of vapor pressure behavior and distillation curves comparable to regular gasoline and, unlike 10 percent ethanol, do not phase separate in the presence of water.

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